Not a collector of expensive and rare stamps, the ones only rich or crazy people can afford and buy. I only collect inexpensive, easy-to-find stamps, which have one thing in common :

a stupid error in their design.

It started more than 40 years ago : I was watching an old envelope, when suddenly my attention was caught by the stamp on it. I could not believe my eyes : THE MAN ON THE STAMP HAD SIX FINGERS ON HIS LEFT HAND !

If you do not believe such a stamp exists, look here at the one it all started with !